Aerator



FIG. 1 is a perspective top view of the aerator;

FIG. 2 is a perspective bottom view of the aerator;

FIG. 3 is a side view of the aerator;

FIG. 4 is a top view of the aerator; and,

FIG. 5 is a bottom view of the aerator. 

CLAIM The ornamental design for a aerator, as shown and described. 